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Hyponastic leaves 1 is required for proper establishment of auxin gradient in apical hooks

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dc.citation.titlePlant Physiologyes
dc.citation.volume187
dc.creatorVacs, Paula
dc.creatorRasia, Rodolfo M.
dc.creatorGonzález Schain, Nahuel
dc.date.accessioned2022-04-11T15:57:33Z
dc.date.available2022-04-11T15:57:33Z
dc.date.issued2021-10-02
dc.description“Dear Editor, Seedlings germinating under the soil surface have evolved an exquisite developmental program termed skotomorphogenesis. In darkness, dicot seedlings rapidly increase the hypocotyl length toward the surface in search of light, while protecting the apical meristem against mechanical damage by forming a hook between the hypocotyl and the two closed cotyledons (Josse and Halliday, 2008). A proper skotomorphogenic growth must be achieved until seedlings reach the light to ensure survival as they depend on limited seed reserves. Thus, plant development in darkness is tightly regulated by a complex network of transcription factors, phytohormones, and several signaling molecules involved in different biochemical and cellular processes (Gommers and Monte, 2018, Mazzella et al., 2014). We recently reported that microRNA (miRNA) biogenesis is necessary for proper skotomorphogenic growth in Arabidopsis thaliana (Sacnun et al., 2020). By studying mutants in the core components of the miRNA microprocessor, such as DICER LIKE 1 (DCL1), HYPONASTIC LEAVES 1 (HYL1), and SERRATE (SE), we showed that hypocotyl elongation in the dark requires all these proteins, probably through the action of specific miRNAs. Surprisingly, we found a microprocessor-independent function of HYL1 as a repressor of hook development. hyl1-2 mutants failed to form and/or maintain the hook at early growth stages, while dcl1 and se mutants displayed a delayed hook unfolding. Together with other findings, we suggested a repressive role of the phosphorylated form of HYL1 in hook opening through the control of the activity and stability of the master regulator of photomorphogenesis ELONGATED HYPOCOTYL 5 (HY5). However, how HYL1 influences differential growth in hooks is still an open question…”es
dc.description.filFil: Vacs, Paula. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET); Argentina.es
dc.description.filFil: Rasia, Rodolfo M. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET); Argentina.es
dc.description.filFil: González Schain, Nahuel. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario (IBR-CONICET); Argentina.es
dc.description.sponsorshipAgencia Nacional de Promoción Científica y Tecnológica: PICT2016-0314
dc.formatapplication/pdf
dc.format.extent2356–2360es
dc.identifier.issn0032-0889es
dc.identifier.urihttp://hdl.handle.net/2133/23391
dc.language.isoenges
dc.publisherAmerican Society of Plant Biologistses
dc.relation.publisherversionhttps://doi.org/10.1093/plphys/kiab455
dc.relation.publisherversionhttps://academic.oup.com/plphys/article/187/4/2356/6380559
dc.rightsopenAccesses
dc.rights.holderVacs, Paulaes
dc.rights.holderRasia, Rodolfo M.es
dc.rights.holderGonzález Schain, Nahueles
dc.rights.urihttp://creativecommons.org/licenses/by/2.5/ar/*
dc.subjectArabidopsises
dc.subjectArabidopsis Proteinses
dc.subjectIndoleacetic Acidses
dc.subjectRNA-Binding Proteinses
dc.subjectSeedlingses
dc.titleHyponastic leaves 1 is required for proper establishment of auxin gradient in apical hookses
dc.typearticle
dc.typeartículo
dc.typepublishedVersion
dc.type.collectionarticulo
dc.type.versionpublishedVersion

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